IAAF World Championships 2017

Darya Klishina of the Authorised Neutral Athletes competes in the Women's Long Jump final during day eight of the 16th IAAF World Athletics Championships London 2017 at The London Stadium on August 11, 2017 in London, United Kingdom. (Image: Getty Images)

From left, United States' Aaliyah Brown, Allyson Felix, Tori Bowie and Morolake Akinosun celebrate after winning the gold medal in the women's 4x100-meter final during the World Athletics Championships in London Saturday, Aug. 12, 2017. (Image: AP)

United States' Dawn Harper Nelson celebrates after winning the silver medal in the women's 100-meter hurdles final during the World Athletics Championships in London Saturday, Aug. 12, 2017. (Image: AP)